-19.16% is the change from 501 to 405
Calculation steps:
[( 405 - 501 ) ÷ 501] x 100 = -19.16%
Formula
Percentage change = [(405 - 501) / 501] x 100
Subtract the new number by the original number
405 - 501 = -96
-96 ÷ 501 = -0.19161676646706588
-0.19161676646706588 x 100 = -19.16%